简介：Inthispaper,theinfluenceofElNi?oeventontheMadden-JulianOscillation(MJO)overtheequatorialPacificisstudiedbyusingreanalysisdataandrelevantnumericalsimulationresults.ItisclearlyshownthatElNi?ocanreducetheintensityofMJO.ThekineticenergyofMJOovertheequatorialPacificisstrongerbeforetheoccurrenceoftheElNi?oevent,butitisreducedrapidlyafterElNi?oeventoutbreak,andtheweakenedMJOevencancontinuetothenextsummer.Theconvectionoverthecentral-westernPacificisweakenedinElNi?owinter.ThepositiveanomalousOLRoverthecentral-westernPacifichasoppositevariationinElNi?owintercomparingtothenon-ENSOcases.TheverticalstructureofMJOalsoaffectedbyElNi?oevent,sotheoppositedirectionfeaturesofthegeopotentialheightandthezonalwindinupperandlowerleveltropospherefortheMJOarenotremarkableintheElNi?owinterandtendtobebarotropicfeatures.ElNi?oeventalsohasaninfluenceontheeastwardpropa-gationoftheMJOtoo.DuringElNi?owinter,theeastwardpropagationoftheMJOisnotsoregularandunanimousandthereexistssomeeastwardpropagation,whichisfasterthanthatinnon-ENSOcase.DynamicanalysessuggestthatpositiveSSTA(ElNi?ocase)affectstheatmosphericthicknessovertheequatorialPacificandthentheexcitedatmosphericwave-CISKmodeisweakened,sothattheintensityofMJOisreduced;thecombiningofthebarotropicunstablemodeintheatmosphereexcitedbyexternalforcing(SSTA)andtheoriginalMJOmaybeanimportantreasonfortheMJOverticalstructuretendingtobebarotropicduringtheElNi?o.

简介：Ｃｈａｒａｃｔｅｒｉｓｔｉｃ　ｍｏｄｅｍｏｄｅｌ　ｏｆ　ｔｒｏｐｉｃａｌ　Ｐａｃｉｆｉｃ　Ｏｃｅａｎ　ａｎｄ　ｄｙｎａｍｉｃ　ｍｅｃｈａｎｉｓｍ　ｏｆ　Ｅｌ　ＮｉｎｏＺｈａｎｇＸｉａｎｇｄｏｎｇ；ＨｕａｎｇＳｈｉｓｏｎｇ；ａｎｄＺｈａｎｇＪｉｎｇ（Ｒ...

简介：[1]BattistiDS.1988.Thedynamicsand

简介：BasedontheSSTandwavedataobservedbyvesselspassingthroughtheNanshaIslandswaters,thispaperanalysesElNinoevent’seffectonhydrologicalfactorsintheabovewaters.Thepaperconcludes(1)SSTintheNanshaIslandswatervarieswiththatoftheEasternEquatorialPacificOceaninsynchronousphase,butvarieswiththatoftheWesternEquatorialPacificOceaninoppositephase;(2)theseastateinNanshaIslandswatersisrough,thefrequencyofgreatwaveincreasesintheyearofElNino,especiallyinthenextyearoftheyearofElNino.Thepaperdiscussesthereasonsfortheabovephenomena.

简介：Inthispaper,byusingtheECMWFobjectiveanalyseddataaswellasCACandNOAAgridpointdataof1981and1983,thesensibleandlatentheatfluxesattheairandseaboundarysurfacewithintherangeof45°E-75°W,35°N-35°SoverthePacificandtheIndianOceanarecalculated.Thepurposeistoanalysethedifferentrevealingfeaturesduringthematurestageandattheendofthe1982-1983ElNinoeventandtocomparethedifferenceofthefeaturesbetweenthdElNinoandthenormal.TheresultshowsthattheairandseaheatexchangewestofthedatelineoverthecentraltropicalPacificduringtheEJNinoperiodismoreintensethanthatofthenormal.However,thefluxesofthesensibleandlatentheatontheseasurfacewithstrongwarmingofSSTneatbyandonthesouthsideoftheequatoreastof170°Warelowandevennegative,andthepatternsofthesensibleandlatentheatfluxesovertheIndianOceanduringtheyearof1983aresimilertothatofnormal.Spatialpatternsofthesensible

简介：ThecentralPacific(CP)zonalwinddivergenceandconvergenceindicesaredefined,andtheformingmechanismofCPElNio(LaNia)eventsisdiscussedpreliminarily.Theresultsshowthatthedivergenceandconvergenceofthezonalwindanomaly(ZWA)arethekeyprocessintheformingofCPElNio(LaNia)events.AcorrelationanalysisbetweenthecentralPacificzonalwinddivergenceandconvergenceindicesandcentralPacificElNioindicesindicatesthatthereisaremarkablelagcorrelationbetweenthem.ThecentralPacificzonalwinddivergenceandconvergenceindicescanbeusedtopredicttheCPevents.Basedontheseresults,alinearregressionequationisobtainedtopredicttheCPElNio(LaNia)events5monthsahead.

简介：Thelong-termtimeseriesanalysisoftheSST(seasurfacetemperature)intheEasternEquatorialPacificOceanandthemonthlyMSL(meansealevel)inthetropicalPacificOceanisconducted.Theirquasiperiodicandlow-frequencyoscillationfeaturesarerevealed.Thesignificantperiodsoflow-frequencyfluctuationsformonthlyMSLintheareaof20°N-20°Sarebetween43.5monthsand50.0months,approximatingcloselyto47.6monthswhichisthesignificantperiodofSSTintheEasternEquatorialPacificOcean.Fromtheresultsofspace-spectralanalysis,thelow-frequencyfluctationsofmonthlyMSLinthetropicalPacificOceanappeartohaveaanticlockwisecircularly-propagatingpattern,whichis,theEasternPacificOcean(off-shoreofMexico)→theareaofNEC(NorthEquatorialCurrent)→theWesternEquatorialPacificOcean→theareaofNECC(NorthEquatorialCounter-Current)→theEasternEquatorialPacificOcean.ThephasesofthepatterncorrespondtothoseofElNinocycle.Onthebasis

简介：